To enhance the information access capacity and signal reception and transmission quality, the remote base station units in heterogeneous passive optical access networks are increasingly becoming miniaturized and densely distributed. Photonic wireless power over fiber(PWoF) technology, which transmits energy via optical fiber to the remote unit, is expected to be the preferred solution for powering the access end. Integrating PWoF technology into passive optical access networks can transmit information and energy simultaneously on a single optical fiber, with certain practical application value. This paper reviews different wavelength-division multiplexing and space-division multiplexing structures of PWoF schemes in passive optical access networks, compares and analyzes the application features, functional realization, and research progress of each technology scheme, and finally discusses the challenges faced by PWoF in its evolution process and prospects.